... and other standard ceramic materials on request. (zirconia, mullite, porcelain)We provide refractory porous crucibles for superalloys ... standard should fit your application. technical performance95porcelain ceramic99porcelain ceramic chemistry composition %al2o395%≥99.7% sio22%≤0. ... 10 times no cracks applicationelectricity vacuum devices, device ceramic thick, textile devices, plate, sintering of color ...